Why do people get so upset about Kossak's threads? Whether you agree with his views or not, I think he's generally respectful towards others, and is always open to debate and hearing other people's points of views. More so than some other members that fly under the radar.
Essentially what you're doing is trying to stop free speech. Why? What are you all so afraid of? Maybe it's natural, a herd of sheep will fear a lone wolf.
Complacency is much more dangerous than actually trying to get to the bottom of things and find out why things are the way they are.
I'm not saying I always agree with his views, and he does seems to always dwell on the same issues, but at least he's trying to understand the world we live in, in his own way. Better than just sticking your head in the sand like most people.
TL;DR: Sticks and stones! If you don't like Kossak's posts, don't read them. Block him, ignore him... whatever you want, but stop trying to prevent people from having an opinion.